Ir₆In₃₂S₂₁, a polar, metal-rich semiconducting subchalcogenide.

ABSTRACT: Subchalcogenides are uncommon, and their chemical bonding results from an interplay between metal-metal and metal-chalcogenide interactions. Herein, we present Ir₆In₃₂S₂₁, a novel semiconducting subchalcogenide compound that crystallizes in a new structure type in the polar P31m space group, with unit cell parameters a = 13.9378(12) Å, c = 8.2316(8) Å, α = β = 90°, γ = 120°. The compound has a large band gap of 1.48(2) eV, and photoemission and Kelvin probe measurements corroborate this semiconducting behavior with a valence band maximum (VBM) of -4.95(5) eV, conduction band minimum of -3.47(5) eV, and a photoresponse shift of the Fermi level by ∼0.2 eV in the presence of white light. X-ray absorption spectro

SUBMITTER: Khoury JF 

PROVIDER: S-EPMC8146499 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature